salam.i am going to upgrade my cpu.i am unable to decide between two cpus.core 2 duo e7500 price is 11500 rupees and e8400 13500 rupees.i read some where that e8400 and e7500 have not big performance difference.plz give me Suggestion which cpu i should buy.my pc spec are asus p5gc mx/1333,ram 4gb 667mhz,radeon hd 6770,500 watt cooler master power supply.